04-01-2010 | #1 |
Join Date: May 2007
Location: Westminster, Maryland
Posts: 3,689
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Replacing Injectors
Last Sunday we replaced the injectors in George's 1990 ZR-1. The car does not have many miles on it and the injectors were original.
The results were the car performed significantly better with new injectors. When I measured the injector coil resistance of the old coils, I found 4 that had low reisitance. My measurements were taken at room temperature. Most of the injectors read 12-12.5 ohms. Three of the bad injectors read about 6 ohms. If you still have original 1990 injectors in your ZR-1, I suggest checking/replacing them. Jim
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If it isn't fun, you aren't doing it right! 1990 Black ZR-1 - sold 1993 Quasar Blue ZR-1 1994 Competition Yellow ZR-1 1995 Dark Purple ZR-1 Maryland State Coordinator WAZOO Member Last edited by QB93Z; 04-01-2010 at 12:30 PM. Reason: cant type write the furst tyme. |
04-01-2010 | #2 |
Join Date: Aug 2006
Location: McLean, VA
Posts: 3,721
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Re: Replacing Injectors
Good to hear. I wonder sometimes how many Zs are out there running on crappy injectors and/or breached vacuum system with owners who are oblivious of the fact.
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04-01-2010 | #3 | |
Join Date: Mar 2008
Location: Pendleton, IN
Posts: 658
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Re: Replacing Injectors
Quote:
But after 15 years (or more) could replacing them produce a noticeable improvement in performance - even though the stock injectors haven't really failed? I am somewhat confused as to the chances of my injectors failing. I remember Dave J had one fail on his '94 but after reading this article on Marc's site I felt there would be little chance I'd need to replace mine? http://www.zr1specialist.com/HAT%20W...eplacement.pdf Sorry Jim, I know the post was targeting the 90 model but I was just considering this issue when you posted the thread. |
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04-01-2010 | #4 |
Join Date: Feb 2009
Location: Alexandria, Virginia
Posts: 1,467
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Re: Replacing Injectors
Guess I better do a measurement on mine. Great....more maitenance to add to my list
Rich
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1990 Bright Red Coupe #608 380 Stroker, Ported Heads/Intake/Housings/TB Haibeck Secondary Delete Chip / Pete's Cams George Braml Intake / FIC Injectors Coated SW Headers / Corsa Bill Boudreau B/B ZF6 / Viper 4.10 gears Ron Davis Radiator Pioneer AVIC-Z140BH NAV Fikse FM5's 285 / 335 / C6 Brakes WAZOO Member |
04-01-2010 | #5 |
Join Date: Dec 2007
Location: Reston, Virginia
Posts: 939
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Re: Replacing Injectors
There has been document failures of 93-95 injectors and many have replace them and experienced engine improvement.
Dave can chime in on this one...
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Michael :cheers: [I][SIZE="2"]1990 RED on RED #566[/SIZE][/I] [I][SIZE="2"]WAZOO MEMBER[/I][/SIZE] |
04-01-2010 | #6 |
Join Date: Apr 2007
Location: Northern VA
Posts: 2,658
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Re: Replacing Injectors
I believe in David's case it was not a coil insulation failure but one stuck open injector.
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04-01-2010 | #7 |
Join Date: Mar 2008
Location: Pendleton, IN
Posts: 658
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Re: Replacing Injectors
Thanks for the quick feedback, guys.
I had just done a search on "injectors" and pulled this thread. I didn't look closely at it's location to realize I was jumping into WAZOO-land. No place I'd rather be given the choice! Back on topic, it makes sense that a new set could improve performance even without a full-blown failure. I bought a set from FIC when they had the limited supply of brand new Bosch injectors and was wondering if I'd really ever use them. They are vacuum sealed but I guess I'll need to have them checked out before I install them if/when that day comes. Last edited by ScottZ95ZR1; 04-01-2010 at 11:06 AM. |
04-01-2010 | #8 |
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Re: Replacing Injectors
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04-01-2010 | #9 |
Join Date: Mar 2008
Location: Pendleton, IN
Posts: 658
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Re: Replacing Injectors
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04-01-2010 | #10 | |
Join Date: May 2007
Location: Westminster, Maryland
Posts: 3,689
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Re: Replacing Injectors
Quote:
Jim |
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